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  MapFieldObject</li>
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            <code>src/app/shared/models/node.model.ts</code>
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                            <h6><b>Properties</b></h6>
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                                        <a href="#name" 
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                                            name
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                                        <code>name:         <code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank" >string</a></code>
</code>
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                                            <i>Type : </i>        <code><a href="https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/string" target="_blank" >string</a></code>

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                                        <code>value:         <code><a href="../interfaces/SimpleFieldObject.html" target="_self" >SimpleFieldObject[]</a></code>
</code>
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                                            <i>Type : </i>        <code><a href="../interfaces/SimpleFieldObject.html" target="_self" >SimpleFieldObject[]</a></code>

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        <pre class="line-numbers compodoc-sourcecode"><code class="language-typescript">import * as _ from &#x27;lodash&#x27;;

interface SimpleFieldObject {
  name: string;
  value: string;
}

interface ListFieldObject {
  name: string;
  value: SimpleFieldObject[];
}

interface MapFieldObject {
  name: string;
  value: SimpleFieldObject[];
}

interface Payload {
  id: string;
  simpleFields?: any;
  listFields?: any;
  mapFields?: any;
}

// This is a typical Helix Node definition
export class Node {
  id: string;
  simpleFields: SimpleFieldObject[] &#x3D; [];
  listFields: ListFieldObject[] &#x3D; [];
  mapFields: MapFieldObject[] &#x3D; [];

  constructor(obj: any) {
    if (obj !&#x3D; null) {
      this.id &#x3D; obj.id;
      this.simpleFields &#x3D; this.keyValueToArray(obj.simpleFields);

      _.forOwn(obj[&#x27;listFields&#x27;], (v, k) &#x3D;&gt; {
        this.listFields.push(&lt;ListFieldObject&gt;{
          name: k,
          value: _.map(
            v,
            (item) &#x3D;&gt;
              &lt;SimpleFieldObject&gt;{
                value: item,
              }
          ),
        });
      });

      _.forOwn(obj[&#x27;mapFields&#x27;], (v, k) &#x3D;&gt; {
        this.mapFields.push(&lt;MapFieldObject&gt;{
          name: k.trim(),
          value: this.keyValueToArray(v),
        });
      });
    }
  }

  public appendSimpleField(name: string, value: string) {
    this.simpleFields.push(&lt;SimpleFieldObject&gt;{
      name,
      value,
    });
  }

  public appendMapField(key: string, name: string, value: string) {
    const index &#x3D; _.findIndex(this.mapFields, { name: key });
    if (index &gt;&#x3D; 0) {
      this.mapFields[index].value.push(&lt;SimpleFieldObject&gt;{
        name: name.trim(),
        value,
      });
    } else {
      this.mapFields.push(&lt;MapFieldObject&gt;{
        name: key,
        value: [
          &lt;SimpleFieldObject&gt;{
            name: name.trim(),
            value,
          },
        ],
      });
    }
  }

  public json(id: string): string {
    const obj: Payload &#x3D; {
      id,
    };

    if (this?.simpleFields.length &gt; 0) {
      obj.simpleFields &#x3D; {};
      _.forEach(this.simpleFields, (item: SimpleFieldObject) &#x3D;&gt; {
        obj.simpleFields[item.name] &#x3D; item.value;
      });
    }

    if (this?.listFields.length &gt; 0) {
      obj.listFields &#x3D; {};
      _.forEach(this.listFields, (item: ListFieldObject) &#x3D;&gt; {
        obj.listFields[item.name] &#x3D; [];
        _.forEach(item.value, (subItem: SimpleFieldObject) &#x3D;&gt; {
          obj.listFields[item.name].push(subItem.value);
        });
      });
    }

    if (this?.mapFields.length &gt; 0) {
      obj.mapFields &#x3D; {};
      _.forEach(this.mapFields, (item: MapFieldObject) &#x3D;&gt; {
        obj.mapFields[item.name.trim()] &#x3D; item.value ? {} : null;
        _.forEach(item.value, (subItem: SimpleFieldObject) &#x3D;&gt; {
          // if the value is a string that contains all digits, parse it to a number
          let parsedValue: string | number &#x3D; subItem.value;
          if (
            typeof subItem.value &#x3D;&#x3D;&#x3D; &#x27;string&#x27; &amp;&amp;
            /^\d+$/.test(subItem.value)
          ) {
            parsedValue &#x3D; Number(subItem.value);
          }

          obj.mapFields[item.name.trim()][subItem.name] &#x3D; parsedValue;
        });
      });
    }

    return JSON.stringify(obj);
  }

  // Converting raw simpleFields to SimpleFieldObject[]
  private keyValueToArray(obj: Object): SimpleFieldObject[] {
    const result: SimpleFieldObject[] &#x3D; [];
    for (const k in obj) {
      if (obj.hasOwnProperty(k)) {
        result.push(&lt;SimpleFieldObject&gt;{
          name: k,
          value: obj[k],
        });
      }
    }
    return result;
  }
}
</code></pre>
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